Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual era a porcentagem de vitórias geral do treinador Dick Bennett?
 ###Tabelas: CREATE TABLE 1947 (1947_id AUTO_INCREMENT PRIMARY KEY, Title VARCHAR, Series VARCHAR, Director VARCHAR, Production Number VARCHAR, Release date VARCHAR, reissue? VARCHAR) CREATE TABLE team_summaries (team_summaries_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Location VARCHAR, Stadium VARCHAR, Capacity INT, Manager VARCHAR, Captain VARCHAR) CREATE TABLE season_1:_2008 (season_1:_2008_id AUTO_INCREMENT PRIMARY KEY, # INT, Advocate # 1 VARCHAR, Advocate # 2 VARCHAR, Root of All Evil VARCHAR, Poll winner VARCHAR, Original air date VARCHAR) CREATE TABLE coaching_history (coaching_history_id AUTO_INCREMENT PRIMARY KEY, Coach VARCHAR, Years VARCHAR, Record VARCHAR, Conference Record VARCHAR, Overall Win Percentage VARCHAR) CREATE TABLE tallest_buildings_by_state_or_territory (tallest_buildings_by_state_or_territory_id AUTO_INCREMENT PRIMARY KEY, State / Territory VARCHAR, Building VARCHAR, Height VARCHAR, Floor count INT, Completed INT)  
SELECT Overall Win Percentage FROM coaching_history WHERE Coach = dick bennett